* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, rgb(25, 25, 25) 0%, rgb(20, 40, 140) 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.app-shell {
    display: flex;
    gap: 20px;
    width: 100%;
    max-width: 1000px;
}

.game-panel {
    flex: 1;
    min-width: 280px;
    position: relative;
}

.building-row {
    position: relative;
}

.popup-card {
    position: absolute;
    top: 12px;
    left: 100%;
    width: 220px;
    background: rgb(255, 255, 255);
    color: rgb(20, 20, 20);
    border: 2px solid rgb(20, 40, 140);
    border-radius: 12px;
    padding: 14px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.35);
    opacity: 0;
    transform: translateX(10px) scale(0.95);
    transition: opacity 0.2s ease, transform 0.2s ease;
    pointer-events: none;
    z-index: 20;
}

.building-popup {
    position: absolute;
    top: 8px;
    left: 100%;
    width: 210px;
    background: rgb(25, 25, 25);
    color: rgb(20, 20, 20);
    border: 2px solid rgb(20, 40, 140);
    border-radius: 10px;
    padding: 10px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateX(8px) scale(0.95);
    transition: opacity 0.2s ease, transform 0.2s ease;
    pointer-events: none;
    z-index: 30;
}

.building-row:hover .building-popup {
    opacity: 1;
    transform: translateX(0) scale(1);
    pointer-events: auto;
}

.buildings-panel-container:hover .popup-card {
    opacity: 1;
    transform: translateX(0) scale(1);
    pointer-events: auto;
}

.container {
    background: rgb(25, 25, 25);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    text-align: center;
    width: 100%;
    max-width: none;
}

h1 {
    color: rgb(255, 255, 255);
    margin-bottom: 30px;
    font-size: 32px;
}

h2 {
    color: rgb(255, 255, 255);
    margin-bottom: 10px;
    font-size: 26px;
}

.mb-20 {
    margin-bottom: 20px;
}

.info-panel {
    background: rgb(25, 25, 25);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.panel-inner {
    background: rgb(35, 35, 35);
    border-radius: 8px;
    padding: 20px;
}

.info-panel p:first-child,
.info-panel h2 {
    color: rgb(255, 255, 255);
    margin-bottom: 10px;
    font-size: 14px;
    text-transform: uppercase;
}

.panel-inner p {
    color: rgb(240, 240, 240);
    margin: 3px 0;
}

.buy-button {
    margin-top: 10px;
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    background: rgb(20, 40, 140);
    box-shadow: 0 5px 20px rgb(20, 40, 140, 0.4);
    color: white;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.1s, box-shadow 0.1s;
}

.buy-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(20, 40, 140, 0.6);
}

.sell-button {
    margin-top: 10px;
    margin-left: 8px;
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    background: rgb(20, 40, 140);
    box-shadow: 0 5px 20px rgb(20, 40, 140, 0.4);
    color: white;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.1s, box-shadow 0.1s;
}

.sell-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgb(20, 40, 140, 0.6);
}

.upgrade-buy {
    margin-top: 10px;
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    background: rgb(102, 51, 153);
    box-shadow: 0 5px 20px rgba(102, 51, 153, 0.4);
    color: white;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.1s, box-shadow 0.1s;
}

.upgrade-buy:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(102, 51, 153, 0.6);
}

.balance {
    color: rgb(255, 255, 255);
    font-size: 36px;
    font-weight: bold;
}

.click-button {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgb(20, 40, 140);
    color: rgb(255, 255, 255);
    font-size: 24px;
    font-weight: bold;
    border: none;
    cursor: pointer;
    margin-top: 25px;
    transition: transform 0.1s, box-shadow 0.1s;
    box-shadow: 0 5px 20px rgb(20, 40, 140, 0.4);
}

.click-button:hover {
    transform: scale(1.05);
    box-shadow: 0 7px 25px rgba(20, 40, 140, 0.6);
}

.click-button.clicked {
    transform: scale(0.95);
}

.click-button:active {
    transform: scale(0.93);
}